You're right. But there's a generational aspect to this too.

Younger generations won't touch Facebook. It's seen as a platform for "old" people. So Facebook is on a modest decline. (Enter Instagram and Tiktok and all that to fill the void...)

Younger western generations perhaps. 3 billion people use Facebook still.

This is a myth. Unless people in their 20s are now considered old.

It doesn't sound silly and Facebook is definitely not as relevant as it was 10 years ago.

The data indicates this is just objectively wrong. So yeah, it's silly to suggest people aren't using the most popular social media site in the world.

Your own data indicates that Facebook is as relevant as ever? Show that to meta they would love it!